By Anisha Sircar (Reuters) -London’s FTSE 100 rose on Monday, boosted by gains in financial and energy stocks, after the blue-chip index posted its third straight weekly drop on sluggish economic growth worries. The blue-chip FTSE 100 index rose 1.5% with banks and oil majors BP and Shell 3.3% each leading gains.[O/R] Meanwhile, the domestically focused FTSE 250 index added 0.5%. London’s main share index fell last week on escalating worries about a recession and bets of bigger interest rate hikes after a cautious raise by the Bank of England. “This is a reprieve after the poor performance las…